definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
40,056 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Audi S4 engine problems

engine problem

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2004 Audi S4 Owner Comments

problem #2

Dec 152014

S4 8-cyl

  • 111 miles


On Saturday morning 12/15/2014 start my card and heard a rattle noise on the engine, first time it make that noise since I bought it. On my way to work I started hearing the rattle noise again but this time it was louder I was driving around 40 mph when this happened. The car started vibrating and kept making the rattle noise on the engine. I just bought this car not even a week ago, and already started having engine problems. I took it to the mechanic and found out the engine might need to be replace soon, since that's a common problem with this cars and that that's one of the signs that the engine might go bad soon.

- Hammond , IN, USA

problem #1

Oct 032011


  • 80,000 miles
Audi claims that the timing chain on those vehicles are lifetime and does not need to be service. Unfortunate the timing change tensioners are made of plastic which the wear out at about 50K miles, causing a start up rattle and eventually engine explosion from the chain coming of the guides and destroying the entire engine and causing a massive accident at high speed. Hundreds of problems like this one are reported online from thousands of people even youtube videos. Not to mention that every time you bring your vehicle and complaint to Audi the claim that the rattle is normal; just to find out that is the first clue of future engine failure.

- Hamden, CT, USA

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